title: Chromium phytotoxicity in radish (Raphanus sativus): effects on metabolism and nutrient uptake.
abstract: In the present investigation, chromium (VI) induced toxicity on metabolic activity and translocations of nutrients in radish were evaluated under controlled glass house conditions. Chromium was found to induce toxicity and significantly affect plant growth and metabolic activity. Excess of chromium (0.4 mM) caused a decrease in the concentration of iron in leaves (from 134.3 to 71.9 μg g(-1) dw) and significant translocation of sulphur, phosphorus and zinc. Translocation of manganese, copper and boron were less affected from root to stem. After 15 days of Cr exposure, maximum accumulation of Cr was found in roots (327.6 μg g(-1) dw) followed by stems (186.8 μg g(-1) dw) and leaves (116.7 μg g(-1) dw) at 0.4 mM Cr concentration. Therefore, Cr may affect negatively not only production, but also the nutritive quality of the radish; likewise, higher Cr content may cause health hazards for humans.
authors.affiliation: Sophisticated Instrumentation Centre for Applied Research and Testing, Vallabh Vidyanagar, 388 120, Gujarat, India.
authors.forename: K K
authors.initials: KK
authors.lastname: Tiwari
authors.forename: N K
authors.initials: NK
authors.lastname: Singh
authors.forename: U N
authors.initials: UN
authors.lastname: Rai
mesh_terms: D001692:Biological Transport; D002857:Chromium / Q000633:toxicity*; D018515:Plant Leaves / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018547:Plant Stems / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D011897:Random Allocation; D031224:Raphanus / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D012989:Soil Pollutants / Q000633:toxicity*; D013054:Spectrophotometry, Atomic
chemical_list: D012989:Soil Pollutants; D002857:Chromium